Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus )
A population of northern bottlenose whales (Hyperoodon ampullatus) inhabits the waters along the edge of the Scotian Shelf. The most important habitat of this population is the Gully, a large submarine canyon, where animals were photographically identified between 1988 and 2003. Open markrecapture...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f05-178 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-178 |
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crcansciencepubl:10.1139/f05-178 2024-03-03T08:45:15+00:00 Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) Whitehead, Hal Wimmer, Tonya 2005 http://dx.doi.org/10.1139/f05-178 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-178 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 62, issue 11, page 2573-2585 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2005 crcansciencepubl https://doi.org/10.1139/f05-178 2024-02-07T10:53:39Z A population of northern bottlenose whales (Hyperoodon ampullatus) inhabits the waters along the edge of the Scotian Shelf. The most important habitat of this population is the Gully, a large submarine canyon, where animals were photographically identified between 1988 and 2003. Open markrecapture models, including mixture models that allow for heterogeneity in identifiability and (or) mortality among individuals, were fitted to identification-history data. Models without heterogeneity in identifiability had poor fit to the data and underestimated population size. The population is estimated to contain about 163 animals (95% confidence interval 119214), with no statistically significant temporal trend. About 12% of the population has a high probability of being identified within the Gully in any year. Many of them are mature males. The remainder is less likely to be identified in the Gully during any year, spend generally shorter periods in the Gully even in years when they are found, and are more likely to be female. This and other work indicate a poorly mixed population inhabiting the canyons and other deeper waters off the Scotian Shelf. Non parametric bootstrap methods were used to validate the estimation procedure and to estimate the efficiency of future fieldwork scenarios. Article in Journal/Newspaper hyperoodon ampullatus Canadian Science Publishing The Gully ENVELOPE(-57.731,-57.731,51.567,51.567) Canadian Journal of Fisheries and Aquatic Sciences 62 11 2573 2585 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Whitehead, Hal Wimmer, Tonya Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
A population of northern bottlenose whales (Hyperoodon ampullatus) inhabits the waters along the edge of the Scotian Shelf. The most important habitat of this population is the Gully, a large submarine canyon, where animals were photographically identified between 1988 and 2003. Open markrecapture models, including mixture models that allow for heterogeneity in identifiability and (or) mortality among individuals, were fitted to identification-history data. Models without heterogeneity in identifiability had poor fit to the data and underestimated population size. The population is estimated to contain about 163 animals (95% confidence interval 119214), with no statistically significant temporal trend. About 12% of the population has a high probability of being identified within the Gully in any year. Many of them are mature males. The remainder is less likely to be identified in the Gully during any year, spend generally shorter periods in the Gully even in years when they are found, and are more likely to be female. This and other work indicate a poorly mixed population inhabiting the canyons and other deeper waters off the Scotian Shelf. Non parametric bootstrap methods were used to validate the estimation procedure and to estimate the efficiency of future fieldwork scenarios. |
format |
Article in Journal/Newspaper |
author |
Whitehead, Hal Wimmer, Tonya |
author_facet |
Whitehead, Hal Wimmer, Tonya |
author_sort |
Whitehead, Hal |
title |
Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) |
title_short |
Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) |
title_full |
Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) |
title_fullStr |
Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) |
title_full_unstemmed |
Heterogeneity and the markrecapture assessment of the Scotian Shelf population of northern bottlenose whales ( Hyperoodon ampullatus ) |
title_sort |
heterogeneity and the markrecapture assessment of the scotian shelf population of northern bottlenose whales ( hyperoodon ampullatus ) |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/f05-178 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-178 |
long_lat |
ENVELOPE(-57.731,-57.731,51.567,51.567) |
geographic |
The Gully |
geographic_facet |
The Gully |
genre |
hyperoodon ampullatus |
genre_facet |
hyperoodon ampullatus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 62, issue 11, page 2573-2585 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f05-178 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
62 |
container_issue |
11 |
container_start_page |
2573 |
op_container_end_page |
2585 |
_version_ |
1792500789621555200 |